|November 8, 2011, 04:34||
Second derivative at wall
I need to implement a slip wall b.c. in second order approximation, that reads:
U = A + B(Kn)*(dU/dn + d2U/dn2)
where U is the velocity at wall, n is the wall-normal direction, A is a constant B(Kn) is a function of the local Knudsen number.
Does someone have an idea on how to get the d2U/dn2? Is it implemented in stuff like groovyBc?
Thanks in advance,
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